Enhanced ionic mobility in organic ionic plastic crystal - dendrimer solid electrolytes

Greene, George, Ponzio, Florian, Iranipour, Nahid, Zhu, Haijin, Seeber, A., Forsyth, Maria and Howlett, Patrick 2015, Enhanced ionic mobility in organic ionic plastic crystal - dendrimer solid electrolytes, Electrochimica acta, vol. 175, pp. 214-223, doi: 10.1016/j.electacta.2015.03.127.

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Title Enhanced ionic mobility in organic ionic plastic crystal - dendrimer solid electrolytes
Author(s) Greene, GeorgeORCID iD for Greene, George orcid.org/0000-0003-2250-8334
Ponzio, Florian
Iranipour, Nahid
Zhu, HaijinORCID iD for Zhu, Haijin orcid.org/0000-0001-6352-7633
Seeber, A.
Forsyth, MariaORCID iD for Forsyth, Maria orcid.org/0000-0002-4273-8105
Howlett, PatrickORCID iD for Howlett, Patrick orcid.org/0000-0002-2151-2932
Journal name Electrochimica acta
Volume number 175
Start page 214
End page 223
Total pages 10
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015
ISSN 0013-4686
Keyword(s) Batteries
Ion conductor
Plastic Crystal
Solid electrolyte
Summary We report the first study of the characterisation of the organic ionic plastic crystal (OIPC) N-ethyl-N-methylpyrrolidinium tetrafluoroborate (C2mpyrBF4) upon mixing with a dendrimer additive. Whereas previous reports of OIPC composite formation (i.e. with ceramics and polymers) have typically reported a decrease in the conductivity when lithium salt had been added, the addition of dendrimer is shown to lead to a substantial enhancement in the lithium containing system, approaching 3 orders of magnitude at 30°C. Mechanical analysis indicates that dendrimer addition leads to a softer more ductile material while microscopy shows that the dendrimer is uniformly distributed and that the crystal microstructure is substantially disrupted, ultimately adopting a dendritic microstructure at 1mol% dendrimer content. Thermal analysis indicates a new phase in the lithium OIPC system, the crystallisation of which is suppressed in the presence of dendrimer. Instead, a decrease in the phase transition enthalpies indicates a large increase in the amorphous component of the Lithium OIPC, particularly for the most conductive system -C2mpyrBF4 +10mol% LiBF4 +0.1mol% dendrimer. Variable temperature powder X-ray diffraction confirms the presence of a new distinct phase and its absence in the presence of dendrimer. A change in the progression of the thermal phase behaviour of the OIPC in the presence of dendrimer is also shown, exhibiting the phase I (high temperature) structure at temperatures below the phase II-I transition.
Language eng
DOI 10.1016/j.electacta.2015.03.127
Field of Research 100705 Nanoelectronics
091205 Functional Materials
Socio Economic Objective 850602 Energy Storage (excl. Hydrogen)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID DP140101535
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30072578

Document type: Journal Article
Collections: Institute for Frontier Materials
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